Features of DCDC Power Module

dcdc power moduleWith its small size, outstanding performance, and convenient use, it has now been widely used, because the module power supply is easy to install, and its structure has many advantages. Therefore, it is often seen in the fields of mobile communication and AC equipment related to the module power supply. Therefore, it can be seen that the module power supply is widely used. So why the dcdc power module can be widely used, so what are its characteristics and advantages, then the editor will analyze the characteristics of the DC/DC power module for you!

Although the reliability of the power supply module is relatively high, it may also have shortcomings. In the dc/dc module, the shortcomings that may occur are generally as follows: 1. The output voltage of the module drops during the operation; 2. The module stops working;

3. The output voltage of the module is too high; 4. The input of the module is short-circuited; 5. The output current of the module is too large.

The modules can be strictly inspected to ensure the reliability of their use, and the power-on inspection can be carried out to remove substandard products. The shortcomings of the first two dcdc power modules generally do not bring great danger.

The third failure method is more dangerous. It can burn the application circuit. Generally, the overvoltage protection is completed by the overvoltage protection circuit. Others can also be completed by adding a Zener diode at the output. When planning, choose the parameters of the diode reasonably to avoid the change of the voltage stabilization point due to different temperatures. Some modules have their own overvoltage protection. Generally speaking, modules below 25w have no overvoltage protection function, and modules above 25w are planned with overvoltage protection circuits. The overvoltage protection point is generally planned to be 135%-145% of the rated voltage. In the specific planning, it is necessary to confirm whether the module has these functions, and avoid repeated planning.

The fourth type will cause input over-current and burn out the printed circuit board in severe cases. Generally, it can be protected by selecting a suitable fuse at the input end. The fuse should generally be placed close to the input end of the power module during wiring. The intention of this plan is to reduce the bow|line inductance of the input line to avoid the lead inductance bow |

The fifth type of dcdc power module failure can be achieved by selecting a power module with overcurrent protection. General power modules have overcurrent protection functions. This type of module can be completed by detecting the current of the primary or secondary side of the modifier. But to lose a certain efficiency. When selecting a voltage module, the larger the power rating, the better. Assuming that the derating is too large, when the user board is short-circuited, due to the existence of the transmission voltage drop, the output current is not enough to complete the module overcurrent protection, which may cause the chip to overheat or even be damaged.

Main features: small size, high reliability; output voltage regulation, accuracy up to +1%; high performance and price ratio; multiple input and output voltages; built-in input filter, low electromagnetic compatibility; aluminum shell frosted oxidation , Six-sided shielding.

In general occasions, the requirements for the isolation voltage of the module power supply are not very high, but higher isolation voltage can ensure that the module power supply has smaller leakage current, higher safety and reliability, and better EMC characteristics. Therefore, the current industry The general isolation voltage level is above 1500VDC. This article introduces the characteristics of the dcdc power supply module. It is a relatively basic power supply knowledge article. I believe that after reading this article, friends who have doubts about the characteristics of dcdc power modules can find their own satisfactory answers.